src/server/h2service.rs

   1 use anyhow::{Error};
   2
   3 use std::collections::HashMap;
   4 use std::pin::Pin;
   5 use std::sync::Arc;
   6 use std::task::{Context, Poll};
   7
   8 use futures::*;
   9 use hyper::{Body, Request, Response, StatusCode};
  10
  11 use proxmox::api::{ApiResponseFuture, HttpError, Router, RpcEnvironment};
  12 use proxmox::http_err;
  13
  14 use proxmox_rest_server::normalize_uri_path;
  15 use proxmox_rest_server::formatter::*;
  16
  17 use crate::server::WorkerTask;
  18
  19 /// Hyper Service implementation to handle stateful H2 connections.
  20 ///
  21 /// We use this kind of service to handle backup protocol
  22 /// connections. State is stored inside the generic ``rpcenv``. Logs
  23 /// goes into the ``WorkerTask`` log.
  24 pub struct H2Service<E> {
  25     router: &'static Router,
  26     rpcenv: E,
  27     worker: Arc<WorkerTask>,
  28     debug: bool,
  29 }
  30
  31 impl <E: RpcEnvironment + Clone> H2Service<E> {
  32
  33     pub fn new(rpcenv: E, worker: Arc<WorkerTask>, router: &'static Router, debug: bool) -> Self {
  34         Self { rpcenv, worker, router, debug }
  35     }
  36
  37     pub fn debug<S: AsRef<str>>(&self, msg: S) {
  38         if self.debug { self.worker.log(msg); }
  39     }
  40
  41     fn handle_request(&self, req: Request<Body>) -> ApiResponseFuture {
  42
  43         let (parts, body) = req.into_parts();
  44
  45         let method = parts.method.clone();
  46
  47         let (path, components) = match normalize_uri_path(parts.uri.path()) {
  48             Ok((p,c)) => (p, c),
  49             Err(err) => return future::err(http_err!(BAD_REQUEST, "{}", err)).boxed(),
  50         };
  51
  52         self.debug(format!("{} {}", method, path));
  53
  54         let mut uri_param = HashMap::new();
  55
  56         let formatter = &JSON_FORMATTER;
  57
  58         match self.router.find_method(&components, method, &mut uri_param) {
  59             None => {
  60                 let err = http_err!(NOT_FOUND, "Path '{}' not found.", path);
  61                 future::ok((formatter.format_error)(err)).boxed()
  62             }
  63             Some(api_method) => {
  64                 proxmox_rest_server::handle_api_request(
  65                     self.rpcenv.clone(), api_method, formatter, parts, body, uri_param).boxed()
  66             }
  67         }
  68     }
  69
  70     fn log_response(worker: Arc<WorkerTask>, method: hyper::Method, path: &str, resp: &Response<Body>) {
  71
  72         let status = resp.status();
  73
  74         if !status.is_success() {
  75             let reason = status.canonical_reason().unwrap_or("unknown reason");
  76
  77             let mut message = "request failed";
  78             if let Some(data) = resp.extensions().get::<ErrorMessageExtension>() {
  79                 message = &data.0;
  80             }
  81
  82             worker.log(format!("{} {}: {} {}: {}", method.as_str(), path, status.as_str(), reason, message));
  83         }
  84     }
  85 }
  86
  87 impl <E: RpcEnvironment + Clone> tower_service::Service<Request<Body>> for H2Service<E> {
  88     type Response = Response<Body>;
  89     type Error = Error;
  90     #[allow(clippy::type_complexity)]
  91     type Future = Pin<Box<dyn Future<Output = Result<Self::Response, Self::Error>> + Send>>;
  92
  93     fn poll_ready(&mut self, _cx: &mut Context) -> Poll<Result<(), Self::Error>> {
  94         Poll::Ready(Ok(()))
  95     }
  96
  97     fn call(&mut self, req: Request<Body>) -> Self::Future {
  98         let path = req.uri().path().to_owned();
  99         let method = req.method().clone();
 100         let worker = self.worker.clone();
 101
 102         self.handle_request(req)
 103             .map(move |result| match result {
 104                 Ok(res) => {
 105                     Self::log_response(worker, method, &path, &res);
 106                     Ok::<_, Error>(res)
 107                 }
 108                 Err(err) => {
 109                      if let Some(apierr) = err.downcast_ref::<HttpError>() {
 110                         let mut resp = Response::new(Body::from(apierr.message.clone()));
 111                         resp.extensions_mut().insert(ErrorMessageExtension(apierr.message.clone()));
 112                         *resp.status_mut() = apierr.code;
 113                         Self::log_response(worker, method, &path, &resp);
 114                         Ok(resp)
 115                     } else {
 116                         let mut resp = Response::new(Body::from(err.to_string()));
 117                         resp.extensions_mut().insert(ErrorMessageExtension(err.to_string()));
 118                         *resp.status_mut() = StatusCode::BAD_REQUEST;
 119                         Self::log_response(worker, method, &path, &resp);
 120                         Ok(resp)
 121                     }
 122                 }
 123             })
 124             .boxed()
 125     }
 126 }